chore: update gpg plugin version (#212)

## Description

Bump the gpg plugin version to try to fix the signing problem

## Checklist

- [x] I have followed this repository's contributing guidelines.
- [x] I will adhere to the project's code of conduct.

Signed-off-by: Ruben Romero Montes <rromerom@redhat.com>

Author: ruromero

pom.xml

@@ -35,7 +35,7 @@
     <maven-dependency-plugin.version>3.6.0</maven-dependency-plugin.version>
     <maven-deploy-plugin.version>3.1.1</maven-deploy-plugin.version>
     <maven-enforcer-plugin.version>3.3.0</maven-enforcer-plugin.version>
-    <maven-gpg-plugin.version>3.0.1</maven-gpg-plugin.version>
+    <maven-gpg-plugin.version>3.2.8</maven-gpg-plugin.version>
     <maven-help-plugin.version>3.4.0</maven-help-plugin.version>
     <maven-install-plugin.version>3.1.1</maven-install-plugin.version>
     <maven-jar-plugin.version>3.3.0</maven-jar-plugin.version>